| 摘要 |
PURPOSE:To perform the switching of power supply between the using and spare devices without using any special controller, by using two systems to supply the power and performing the switching between the using and spare devices basing on the information on the supply and interruption of power of power supply lines of the two systems. CONSTITUTION:The power is supplied from a power source 1 to a using device 7 of a remote device 10 to be power supplied and a switch circuit 9 via a switch 3 and a power supply line 5. At the same time, the power is supplied from a power source 2 to a spare device 8 of the device 10 and the circuit 9 via a switch 4 and a power supply line 6. Then the switch 4 is made in a working mode of the device 7, and the power is supplied to the device 8. If the circuit 9 is previously made with priority, the operation of the device 7 is kept as it is. As a result, the device is inactive and the device 8 works when the switch 3 is broken. |
